from flask import abort, jsonify
from flask import current_app, render_template
from flask import g
from flask import request
from flask import session

from info import constants, db
from info.models import News, User, Comment, CommentLike
from info.modules.news import news_blu
from info.utils.common import user_login_data
from info.utils.response_code import RET


@news_blu.route("/followed_user", methods=["POST"])
@user_login_data
def followed_user():
    # 是否关注
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="没有登陆error")

    user_id = request.json.get("user_id")
    action = request.json.get("action")

    if not all([user_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="data error1")

    if action not in("follow", "unfollow"):
        return jsonify(errno=RET.PARAMERR, errmsg="data error2")

    try:
        other = User.query.get(user_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询 error")
    # 想当前用户的关住列表加数据
    if not other:
        return jsonify(errno=RET.NODATA, errmsg="no data error")

    if action == "follow":
        if other not in user.followed:
            user.followed.append(other)
        else:
            return jsonify(errno=RET.DATAERR, errmsg="当前用户已经被关注")
    else:
        # q取消关注
        if other in user.followed:
            user.followed.remove(other)
        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前用户没有被关注 error")

    return jsonify(errno=RET.OK, errmsg='OK')


@news_blu.route("/comment_like",methods=["POST"])
@user_login_data
def comment_like():

    user = g.user
    if not user:
        jsonify(errno=RET.SESSIONERR, errmsg="用户未登陆")

    # 取参数
    # news_id = request.json.get("news_id")
    comment_id = request.json.get("comment_id")
    action = request.json.get("action")

    if not all([comment_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action  not in ["add", "remove"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:

        comment_id = int(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据错误")

    if not comment:
        return jsonify(errno=RET.NODATA, errmsg="评论不存在")

    if action == "add":
        comment_like_model = CommentLike.query.filter(CommentLike.user_id==user.id, CommentLike.comment_id==comment_id).first()
        if not comment_like_model:
            # like
            comment_like_model = CommentLike()
            comment_like_model.user_id = user.id
            comment_like_model.comment_id = comment.id
            comment.like_count += 1

    else:
        # cancel
        comment_like_model = CommentLike.query.filter(CommentLike.user_id==user.id, CommentLike.comment_id==comment_id).first()
        if comment_like_model:
            # comment_like_model.delete()
            db.session.delete(comment_like_model)
            comment.like_count -= 1
    try:
        db.session.add(comment_like_model)
        db.session.commit()
    except Exception as e:
        db.session.rolllback()
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据库操作失败")

    return jsonify(errno=RET.OK, errmsg="OK")

@news_blu.route("/news_comment", methods=["POST"])
@user_login_data
def comment_news():

    user = g.user
    if not user:
        jsonify(errno=RET.SESSIONERR, errmsg="用户未登陆")

    # 取参数
    news_id = request.json.get("news_id")
    comment_content = request.json.get("comment")
    parent_id = request.json.get("parent_id")

    if not all([news_id, comment_content]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        news_id = int(news_id)
        if parent_id:
            parent_id=int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 查询新闻，并判断新闻是否存在
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    # 初始化评论模型，并且赋值
    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_content

    if parent_id:
        comment.parent_id = parent_id

    # add to mysql
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return jsonify(errno=RET.OK, errmsg="OK", data=comment.to_dict())


@news_blu.route("/news_collect", methods=["POST"])
@user_login_data
def collect_news():

    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR,errmsg="用户未登陆" )
    # 查询参数
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    #　判断参数
    if not all ([news_id,action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    if action not in ["collect", "cancel_collect"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 查询新闻，并判断新闻是否存在
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    #　收藏和取消收藏
    if action == "cancel_collect":
        # 取消收藏
        if news in user.collection_news:
            user.collection_news.remove(news)
    else:
        if news not in user.collection_news:
            user.collection_news.append(news)

    return jsonify(errno=RET.OK, errmsg="操作成功")


@news_blu.route("/<int:news_id>")
@user_login_data
def news_detail(news_id):
    """新闻详情

    """
    # 判断用户是否登陆
    user = g.user
    # user_id = session.get("user_id",None)

    # user = None
    # if user_id:
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)

    # 右侧的新闻排行的逻辑
    news_list = []
    try:
        # 点击量ｃｌｉｃｋ
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    news_dict_li = []
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    # 查询新闻数据 根据ｕｒｌ中传入的news_id查询模型类
    news =  None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
    if not news:
        abort(404)

    # 更新新闻的点击次数
    news.clicks += 1

    # 判断是否收藏
    is_collected = False
    if user:
        if news in user.collection_news:
            is_collected = True
    # 查询评论数据
    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id==news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)

    # 初始化
    comment_like_ids = []
    try:
        if user:
            # 查询当前用户在当前新闻点赞了那些评论
            # all of 评论id
            comment_ids = [comment.id for comment in comments]
            #1 all of comment abort this new
            #@那些评论被当前用户点赞
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),
                                                     CommentLike.user_id==user.id).all()
            # 所有被点赞的评论id
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
    except Exception as e:
        current_app.logger.error(e)

    comment_dict_li = []
    for comment in comments:
        comment_dict = comment.to_dict()
        # 代表没有点赞
        comment_dict["is_like"] = False
        if comment.id in comment_like_ids:
            comment_dict["is_like"] = True
        comment_dict_li.append(comment_dict)

    # 2019/06/05 : 00:50---fgb
    is_followed = False
    if news.user and user:
        if news.user in user.followed:
            is_followed = True



    data = {
        "news_dict_li": news_dict_li,
        "user": user.to_dict() if user else None,
        "news": news.to_dict(),
        "is_collected": is_collected,
        "comments":comment_dict_li,
        "is_followed":is_followed
    }
    return render_template("news/detail.html", data=data)